Improvement in laying concrete pavements



S. S. INGALLS.

LAYING CONCRETE PAVEMENTS.

No, 195,287, Patented Sept.18,1877.

STATES PATENT OFFICE.

SAMUEL S. INGALL S, OF CHICAGO, ILLINOIS.

IMPROVEMENT l-NLAVING CONCRETE PAVEMENTS.

Specification forming part of Letters Patent No. 195,287, datedSeptember 18, 1877; application filed June 26, 1877.

To all whom it may concern:

Be it known that I, SAMUEL S. INGALLS, of the city of Chicago, Cookcounty, State of Illinois, have invented a new and useful Improvement inCorner-Protectors, to be used in laying concretefitblocks, of whichthefollowing is a full description, reference being had to theaccompanying drawings, in which- Figure 1 is a plan view, showing theposition of my device in use; Figs. 2 and 3, elevations, showing thesame; Fig. 4., a plan view of my device; Fig. 5, a side elevation,showing the two parts separated; Fig. 6, a crosssection at a: of Fig. 4;Fig. 7, a rear view; Fig. 8, a section at y of Fig. 7.

It is customary to lay concrete pavements, especially for sidewalks, inblocks, and oftentimes difl'erent colors are used in the same pavement;and in laying such pavements the edges of the blocks are liable to beinjured, and unless care is used the colors mingle at the edges of theblocks.

My improvement is designed to be used in laying pavements of this class;and its object is to protect the corners, prevent the intermingling ofthe colors, and facilitate the work.

In the drawings, A represents the line where the work commences-as afence, wall, or building. B are triangular blocks, which have been laid.0 represents my device in use. D is a frame, ordinarily used in makingand laying such pavements. E is the space to be filled to form a block.

My device consists of two blocks of wood, a b, formed as represented inFigs. 4 and 6. a, is rabbeted out so as to receive b. c is a thin pieceof sheet metal, secured to the face of a, and extending below the loweredge aboutone-quarter of an inch. d is another piece of sheet metal,secured to the under side of b, and projecting forward far enough tocome in contact with 0 when the parts are in the position represented inFig. 6. These two pieces of metal 0 d form a right angle at c. ff aretwo pins secured to b, and g g are two corresponding holes in a.

The two parts a b are temporarily connected together by means of thesepins and holes;

but a can be readily removed from b. b are two cavities or recesses inthe back side of a to receive a lever, F, which is to be used in liftinga from b.

Two edges of the completed blocks require protection whilelaying thenext block.

In use, my device is placed over one edge of the completed block, sothat the corner thereof will be in the angle 0, the device resting uponthe block B, and the lower portion of the metal 0 being a little belowthe surface of the block. The corner G is to be protected in the samemanner. Then the material is to be filled into the space E, for example,during which process the corners of the two completed blocks will beperfectly protected from injury, and the work can progress withoutspecial care.

After the space E has been filled with the material, a can be liftedgradually by means of the lever F, and then removed, b being at the sametime held firmly in place, and remaining in place after the removal ofsuch part a. a being removed, there will be a small open joint,extending only to the depth which 0 entered the concrete, and this jointis then to be filled up by passing a trowel along or over the edge ofthe metal d and the joint, during which process the completed blockswill still be so protected that the material of the colored blocks willnot, any of it, be carried beyond the proper line.

In actual use this device has proved to be useful and efficient for thepurpose for which it is designed.

I usually make my device about three and a half to four inches wide, andabout an inch and a half in height, the extreme length being equal tothe length of the blocks, and the ends to be cut at an angle, as shown.

I am aware that it has been customary to use a piece of sheet metalbetween concrete blocks during the process of laying the pavement; butit has been found difficult to remove such strip without injuring thecorner of the completed block. By the use of my device this difficultyis perfectly avoided, because the block b and the sheet metal 6 remainin place while the metal strip 0 is being removed, completely protectingthe corner of the completed block; and if the corner of the block lastformed should be slightly injured A corner-protector, consisting of thetwo blocks a b, and thin metal facings c d, the block a being easilydetachablefrom the block b, all constructed and adapted to be usedsubstantially as and for the purposes set forth.

SAMUEL S. DTGALLS.

Witnesses:

E. A. WEST, O. W. Bonn.

